Heckler & Koch HK416
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The Heckler & Koch HK416 is an assault rifle chambered for the 5.56×45mm NATO cartridge. It is designed and manufactured by the German company Heckler & Koch. Wikipedia
Origin: Germany
Action: Gas-operated short-stroke piston, rotating bolt
Effective firing range: A5 11: 300 m (330 yd)
Feed system: STANAG magazine
Height: 236–240 mm (9.3–9.4 in)
Length: 709–1,030 mm (27.9–40.6 in) (A5, retractable stock)
Mass: 3.120–3.850 kg (6.88–8.49 lb) (A5 without magazine); 3.740–4.470 kg (8.25–9.85 lb) (A5 with full 30-round magazine)